<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>2.姓名案例_methods语法实现</title>
    <script type="text/javascript" src="../js/vue.js"></script>
  </head>
  <body>
    <!--准备好一个容器-->
    <div id="root">
      姓：<input type="text" v-model="firstName" /> <br />
      名：<input type="text" v-model="lastName" /> <br />
      姓名：<span> {{fullName()}}</span>
    </div>
  </body>

  <script type="text/javascript">
    new Vue({
      el: "#root",
      data: {
        firstName: "张",
        lastName: "三",
      },
      methods: {
        fullName() {
          return this.firstName + "-" + this.lastName;
        },
      },
    });
  </script>
</html>
